PLATE Y. 
Figs. 1 — 8. STIGJI.4.T0PYGUS ELATUS, Forbes, p. 28 ; 1 — b, top views of different specimens to 
show the variations in the form of outline ; ba — d, posterior-, front-, side — and 
lower views of the specimen, fig. 5 ; 6, side view of a large and much elevated 
specimen ; 7 and 8, inner views of the basal portion of the test, with the centrally 
situated aperture j 1 to 4 and 7 — 8 are from Yerinanoor\ 5 and 6 from near 
Comar apoUiam ; Arrialcor group. 
Fig. ... 9. Cassidulus testedo, p. 31 ; copies of Forbes' original figures. 
Figs. 10 — 11. Cassideles Oldhamianes, Stol., p. 30; five views of two different specimens; 
north of Poodoopolliam ; Arrialoor group. 
Fig. ... 12. Cassideles EMYS, p. 31 ; Odium, Oolatoor group. 
Figs. 13 — 14. Cassideles grasses, Stol., p. 32; five views of two different specimens ; in fig. 13 
the superficial ornamentation is much worn off ; north of Foodooptolliam ; Arria- 
loor group. 
